1results about How to "Uniform internal organization" patented technology

The application discloses a kind of high-nitrogen high-aluminum new energy automobile gear steel and manufacturing method thereof, steel chemical composition mass percentage: C 0.18-0.25%, Si 0.2-0.4%, Mn 0.6-0.9%, Cr 0.8-1.2%, Ni 0.3-0.6%, Mo≤0.10%, Al 0.05-0.09%, N 0.018-0.025%, P≤0.01%, S≤0.005%, the balance Fe and impurities.Preparation method: electric furnace smelting→LF refining→VD vacuum degassing nitrogen-increasing→continuous casting→grading temperature control rolling.The application forms dispersed AlN grain refinement by Al-N cooperation, strictly controls harmful element to improve purity, has high strength, high toughness, high wear resistance and high fatigue resistance, tensile strength≥1200MPa, adapts new energy automobile high speed high torque condition, process is stable and can be mass-produced.